code: def num_attention_heads(self) -> int:
      return self._config.num_heads
  
file_path: transformers/src/transformers/models/gpt_neo/configuration_gpt_neo.py
imports: from collections import OrderedDict
  from typing import Any, Mapping, Optional
  from ...None import PreTrainedTokenizer, TensorType, is_torch_available
  from ...configuration_utils import PretrainedConfig
  from ...onnx import OnnxConfigWithPast
  from ...utils import logging
label_desc: Use image node_id 2 for calling the GPTNeoOnnxConfig obj's underlying member method code with example usage: obj.num_attention_heads() and returns: self